Malicious PDF — malware analysis report

Static analysis result for SHA-256 02bf313bb2c353e5…

MALICIOUS

PDF

82.6 KB Created: 2021-04-18 23:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e5f537d9dcd33c6b38424a87d0252dc1 SHA-1: 0a3bde5066694133492445cb16b9d72621ed14eb SHA-256: 02bf313bb2c353e509435aa0088c8b5659b74787bf85347a4b3161b79bd7328b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to 'lyn genet reviews' and is generated by wkhtmltopdf, suggesting a lure document. The presence of numerous links to disposable domains and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/strik?utm_term=lyn+genet+reviews In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_602e1dd046082.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451945/normal_6001da921fdd8.pdfIn PDF document text
    • http://mscredit.info/8261263812328jmj.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/example_of_a_central_idea_statement.pdfIn PDF document text
    • http://fiwetud.scienceontheweb.net/alimentacion_correcta_definicion.pdfIn PDF document text
    • http://drovazvenigorod.ru/how_long_can_a_baby_sleep_in_a_co_sleeperzc7i2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459326/normal_60635da1164c4.pdfIn PDF document text
    • http://ririxodija.22web.org/41278048537.pdfIn PDF document text
    • http://physcoo.com/dejuboximokowiwiviridiw5g5j0.pdfIn PDF document text
    • http://com-signto5.xyz/best_online_drug_guide_for_nurses7vy4o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://dufobirufo.atwebpages.com/viral_gastroenteritis.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/literature_and_the_writing_process.pdfIn PDF document text
    • http://jijeledinevo.rf.gd/arabic_verbs_with_urdu_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b420c39d-c1e1-48da-a78a-9620635fc559/easiest_way_to_learn_thai_alphabet.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/natural_draft_cooling_tower_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1de3a61-f59e-45e6-8952-9d2a6a21e2a0/how_to_do_self_clean_on_samsung_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7a691a1-5cf2-429d-8e8c-428d8dc62581/butefoburuliduk.pdfIn PDF document text
    • http://zoratamit.epizy.com/rosufosazemezomi.pdfIn PDF document text
    • http://megigezorozo.atwebpages.com/58981375691.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF884 4808 bytes
SHA-256: 1b14e98139faad593cca7624690741e9d9cff12d619e366f1b52285443b38a00
font_01_sfnt_off0001090c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090C 6068 bytes
SHA-256: 7a02da73c5ff24218d04b188db7d31ceb9303d5dedd43b645f18a615a19d9b6a
font_02_sfnt_off000118bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BD 10904 bytes
SHA-256: a353a160bc1c3b01397b00d2e189649ed1e0878bc38720e056f30e3988217c42

Open this report in the interactive analyzer, or submit your own file for analysis.